package IT.Demo.Web.Servlet;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class BaseServlet extends HttpServlet {


    protected void service(HttpServletRequest req, HttpServletResponse resp) {

        String requestURI = req.getRequestURI();//获取请求路径

        int index = requestURI.lastIndexOf("/");//截取最后一段方法名（路径）

        String methodName = requestURI.substring(index + 1);

        Class<? extends BaseServlet> cls = this.getClass();

        try {
            //获取method对象
            Method method = cls.getMethod(methodName, HttpServletRequest.class, HttpServletResponse.class);
            //2.3 执行方法
            method.invoke(this,req,resp);
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

    }
}
